Multi-cluster Kubernetes Platform
GitOps with ArgoCD, Helm/Ansible pipelines, observability stack, secrets & SSO hardening.
K8sArgoCDHelmAnsibleProm/GrafanaKeycloak
Koresha
SRE · DevSecOps
About Me
I'm a SRE / DevSecOps engineer focused on multi-cluster Kubernetes, CI/CD, Infrastructure as Code,
SSO implementation, security hardening and comprehensive observability. I enjoy automating complex
workflows and building resilient, scalable systems.
I'm passionate about open source and an active member of the OpenInfra Community.
Infrastructure
Kubernetes, OpenStack, Cloud platforms
Security
DevSecOps, SIEM, SSO, Compliance
Monitoring
Prometheus, Grafana, Observability
Skills & Technologies
Professional Experience
UN
Site Reliability Engineer
unyc
Cloud & Connectivity • 200 (Inherent Group: 1,300) employees
Sep 2025 — Present
Connectivity, cloud and cyber operator specializing in indirect sales with an ecosystem of 1,300 partners and an automated services platform serving French businesses and communities.
-
Architect and manage multi-tenant OpenStack private cloud with 200+ VMs and Ceph storage. -
Infrastructure as Code with OpenTofu: complete automation of compute, network and storage resources. -
Deploy and maintain Kubernetes clusters (3 environments: dev, staging, prod) with high availability. -
Implement GitOps CI/CD pipeline with Helm, Ansible and ArgoCD for 15+ applications. -
Integrate External-DNS with Azure for automated DNS records management. -
Advanced monitoring with Prometheus, Grafana and AlertManager: 99.9% uptime maintained. -
Manage S3-compatible object storage (MinIO) with backup and cross-region replication.
OpenStack Kubernetes OpenTofu Helm Ansible ArgoCD Azure DNS Prometheus Grafana S3 MinIO
Featured Projects
OpenStack private cloud
Compute/network/storage automation, External-DNS (Azure), S3 compatible object store.
OpenStackOpenTofuS3External-DNS
DevSecOps Pipeline
Automated security scanning, vulnerability assessment, compliance reporting with ELK SIEM integration.
JenkinsELKSecurityComplianceSIEM
Infrastructure as Code
Complete infrastructure automation with Terraform/OpenTofu, Ansible configuration management and GitOps workflows.
TerraformOpenTofuAnsibleGitOpsIaC
Latest Articles
GitOps with ArgoCD: Complete Guide for Beginners
Learn how to implement GitOps in your Kubernetes projects with ArgoCD. From installation to production deployment.
GitOpsArgoCDKubernetesCI/CD
Securing Kubernetes Clusters in Production
Security best practices for your K8s clusters: RBAC, Network Policies, Pod Security Standards and more.
KubernetesSecurityDevSecOpsRBAC
Infrastructure as Code: OpenTofu vs Terraform
Detailed comparison between OpenTofu and Terraform: features, performance and migration strategies.
IaCOpenTofuTerraformDevOps
Advanced Monitoring with Prometheus and Grafana
Setting up a complete monitoring stack for your applications and infrastructure.
MonitoringPrometheusGrafanaObservability
Let's Work Together
I'm always interested in discussing new opportunities, sharing knowledge, or collaborating on interesting projects. Feel free to reach out!